Juniper J2300 User Manual page 242

J-series™ Services Router User Guide
Field Values
Down
Number of unavailable BGP peers.
Peers
Peer
Address of each BGP peer.
InPkt Number of packets received from the peer,
OutPkt Number of packets sent to the peer.
Flaps Number of times a BGP session has changed state
from Down to Up.
Last
Last time that a session became available or
Up/Down
unavailable, since the neighbor transitioned to or from
the established state.
State
A multipurpose field that displays information about
BGP peer sessions. The contents of this field depend
upon whether a session is established.
If a peer is not established, the field shows
the state of the peer session: Active, Connect,
or Idle.
If a BGP session is established, the field shows
the number of active, received, and damped
routes that are received from a neighbor. For
example, 2/4/0 indicates two active routes,
four received routes, and no damped routes.
BGP Neighbors
Peer
Address of the BGP neighbor.
AS AS number of the peer.
Type Type of peer: Internal or External.
State
Current state of the BGP session:
Active—BGP is initiating a TCP connection
in an attempt to connect to a peer. If the
connection is successful, BGP sends an open
message.
Connect—BGP is waiting for the TCP
connection to become complete.
Established—The BGP session has been
established, and the peers are exchanging
BGP update messages.
Idle—This is the first stage of a connection.
BGP is waiting for a Start event.
OpenConfirm—BGP has acknowledged receipt
of an open message from the peer and is
waiting to receive a keepalive or notification
message.
OpenSent—BGP has sent an open message
and is waiting to receive an open message
from the peer.
212
Using the Monitoring Tools
Additional Information
A high number of flaps might indicate a problem with
the interface on which the BGP session is enabled.
If the BGP session is unavailable, this time might be
useful in determining when the problem occurred.
Generally, the most common states are Active, which
indicates a problem establishing the BGP conenction,
and Established, which indicates a successful session
setup. The other states are transition states, and BGP
sessions normally do not stay in those states for
extended periods of time.